Trouble Flow Chart; Power Does Not Turn On Even Though The; On/Standby Switch Is Turned On - Sony UP-D898DC Service Manual

2-2. Trouble Flow Chart

2-2-1. Power does not turn on even though the ON/STANDBY switch is turned on
Power does not turn on even
though the ON/STANDBY switch
is turned on
Is the DC power of 12 V to
24 V supplied from the external
power supply to the DC connector?
Yes
Is 12 V to 24 V output from
pins 3 and 4 of CN801 on the
DC-182 board?
Yes
Is 12 V to 24 V output from
pin 1 of CN101 on the MA-201
board?
Yes
Replace the MA-201 board.
(Refer to Section 3-8.)
UP-D898DC
Connect the DC power cable correctly
using the external power supply having
No
sufficient power supply capability. If the
symptom persists, replace the external
power supply or DC power cable.
Connect the harness from the DC connector
correctly. If the symptom persists, replace the
No
harness (DCIN-DC182, 4PS) connected to
CN801 on the DC-182 board. (Refer to Section 5.)
Is the harness connecting CN803
No
on the DC-182 board and CN101
on the MA-201 board normal?
Is the harness connecting CN903
on the SW-1703 board and
CN1001 on the MA-201 board
normal?
Is the voltage at pin 4
(REMOTE_N) of CN803 on the
DC-182 board approx. 0.5 V or
less?
Replace the DC-182 board.
(Refer to Section 3-6.)
No
Yes
No
Yes
No
Yes
Connect harness correctly. If the
symptom persists, replace
haeness. (Refer to Section 5.)
Connect harness correctly. If the
symptom persists, replace
haeness. (Refer to Section 5.)
Replace the SW-1703 board.
(Refer to Section 3-7.)
2-3 (E)